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. 2015 Jul 29;5:12665. doi: 10.1038/srep12665

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(a) Conceptual illustration of the slit-groove plasmonic interferometer. (b) Spectral interference fringes (L = 10 μm) simulated by FDTD method (black) and analytical equation without (blue) or with (red) considering the phase dispersion, φ₀(λ).